upstart script for unicorn app server

app_name.conf

#/etc/init/change_this_to_your_app_name.conf
description "App Name"
author "Admin Name <admin@app.com>"
 
start on virtual-filesystems
stop on runlevel [06]
 
env PATH=/usr/local/rbenv/shims:/usr/local/rbenv/bin:/usr/local/bin:/usr/bin:/bin
 
env RAILS_ENV=staging # what environment
env RACK_ENV=staging # what environment
 
setuid deployer # linux user
setgid admin    # group
 
chdir /opt/apps/app_name
 
pre-start script
  exec /usr/local/rbenv/shims/unicorn -D -c /opt/apps/app_name/config/unicorn.rb --env staging
end script
 
post-stop script
  exec kill `cat /tmp/unicorn.app_name.pid`
end script